Process for making electrodes



Sep.. 23 1924. 1,509,799

J.M.STEPHENSEN PROCESS FOR MAKING E'LECTRODESk `FiledApril l, 1922 A TTDmvErs Patented sept. as,- 1924.

JOHN 1v1. s'rnrnnnssrr, or naoonnrrr, NEW Your;

PRCESS EUR MAKHQ'G ELECTRODES.

appncauenmed .April 1, ieee. serial no. 548,602.

To all 'wwm t may concern:

Be it knownthat I, JOHN M. STEPHENSEN, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented neu7 and useful 1mprovements in Processes for Making Electrodes, of which the following is a full, clear,

- and exact description.

This invention relates to a 'process for mixing pulverized solid materials with solid pulverized binders so'that they form a plastic mass, and was primarily created'for the preparation of electrodes.

Generally' in the processes now Iused for making electrodes there is a great volume of dust created which is extremelyv injurious to laborers who are not only endeavoring to provide for their needs but who are also producing articles which are necessary in the various manufacturing industries that provide the goods demanded by the people. Consequently, taking into account the injury done to the laborers by the volumes of dust, many. have endeavored to provide processes for the manufacture of electrodes which to j a great extent eliminate the dust thus denying the industry the toll of human life which it demands.

The general object ofthe invention is the provi-sion of a cheap, simple and eiicicnt process for transforming pulverized materials into a plastic mass capable of being cast to the desired sha-pe and size.

A further object is the provision of a process and apparatus for the manufacture of electrodes and the like that does not give rise to any copsiderable amount of dust which is likely Jltb injure the laborers.

These objects are accomplished by feeding a pulverized body-giving material in a heated condition intopi e means and supplying a compressed heate fluid to force the pulverized material through the pipe means, and introducing into the pipe means a binder, and finally projecting the mixture into a mold.

These and other objects of the invention will be more clearly understood from the following detailed description which refers to the accompanying drawing.

The drawing shown is a diagram showing4 the equipment necessary for carrying out the process.

Referring tothe above-mentioned drawing, three hoppers 1, 2. and 3 are supported in the door 4. Conveyors 5 and 6 extend over the hoppers, theconveyor 6 serving to supply a solid pulverized material to' hopper 1 While conveyor 5 supplies pulverized pitch to hopper 2. A tar oil or other suitable oil is supplied to hopper 3 through a pipe 7' coil 13 mounted. on the pipe 12 when the compressed air from any suitable source is fed through the pipe line la into the pipe line 11, forcing the hea-ted solid pulverized material through the pipe line 11.. The compressed air passing through the pipe line la is heated by an electric coil 15 mounted on the pipe 11. A casing 16 is interposed in the pipe line 11 and into this casing pulverized pitch is fed by means `of a feeding device 17 Whch is drivenv by the motor 10. An auxiliary pipe line 18 is connected rwith the pipe line 14 and supplies compressed air to the casing 16. rlhis serves to force the pulverized pitch entering the casing 1G into the pipe line 11, mining it with the pulverized material passing through the pipe line. A valve 20 is provided for controlling the How of compressed air into the casing 1G.

Oil contained inthe hopper 3 is fed into a casing 22 introduced into the pipe line 11- by means of a pipe 19 controlled by a valve 21. Compressed air is also fed into this casthe pipe line 11 it is heated by the electric i ing from the auxiliary pipeline 18 and the lovvof the compressed air is controlled by the valve 23.

.with the nozzle 25 and the mixture is sprayed around this mold by means of the eccentrically mounted nozzle 25. After the mold. 26 has been lilled it is fed 'to an ejector which removes the material therefrom. and if it is desired to hasten the oooh' of the molded material it may aloe placed `.in-a 27. 1n malnnganodes molds such 26 are Thus the oil which serves to make the mixture more plastic 1s introduced.V

. used, but 1n order to make cathodes, which are usually large and of different shapes the eccentrically mounted nozzle 25 would not be satisfactory. Consequently-a iexible hose with a straight nozzle 1s substituted for the. nozzle and this and nozzle are used to spray the mixture'into molds which may be of different sizes and shapes. .The solid prepared pulverized carbon use would depend on the qualities it is desired that the electrodes should have.' The .carhon selected is then heated and by the -use 'of heated compressed air or other suitable' Huid is forced through the pipe line 11 `When it l.reaches casing 16 it is mixed with the solid pitch or other binder to heat the same and isiinally forced along the 1 line to the casing22 Where the oil w ich increases the plasticity of the mixture is added. .Then the lastic mixture is projected into a suitablie mold.` If, under cer tain .conditions by heating the carbon and the air, a. satisfactory mixture is not obtained provision may be made for heating the hinder and the o1l.

The process described above is 'pr mak-I ing raw electrodes which for certain pur'- lposes may be roasted to give the desired type oit-electrode. In other cases the electrodes are use d without baking. These are`known as self-baking electrodes since they are baked duringtheir use. In theahove.de-v scription in theu lreierred process a carbon and a pitcln bin er are set forth'fbut elec- 4trodes mightlbe made from a carbon and f the oil and this vis sometimes' the process used, the oil serving as the binder..

would state in conclusion that while the illustrated exampleA constitutes a practical embodiment ofmy invention I do not limit myself strictly to the enact details. herein illustrated since manifestly -the same can be considerably varied Without departing from the spirit of the invention as defined in the appended claims. ,d

Claims:

' 1; A process for preparing a mixture for V 'making electrodes, comprising the forcing throulgh the continedchannel.

of a prepared carbon through a'pipe line, 'and spraying a binder onto the repared 2. A. process for preparing a mixture for the making of electrodes, comprising the forcing of a prepared carbon through a con inedchannel by the use ott acompressed lfluid, and introducing a. binder by spraying from all sides 'onto thecarbon as it passes` precess -for preparing a mixture for` the making of electrodes," comprising the orclng of a pulverized carbon through a pipe line, and spraying a binder onto the dit pulverized carbonv as it passes through thev its plasticity.

the making of electrodes, comprising the -forcing oi a pulverized carbon `through a pipe line by t e use of compressed air, introducing a hinder through a spraying device associated with the pipe linez and supplying an oil to themixture for increasing its plasticity.

5. A process for preparing a mixture for the making of electrodes,- comprising the forcing of4 a pulverized carbon vthrough a confined passage by the use of compressed air, heating said ulverized carbon :1nd com-f pressed air as t ey pass -through the' confined.' passage, and introducing a binder from all sides of the confined passage.

.6. A process for preparing a mixture for bon as it passes through introducin mix with t been heated.

7. A. process for preparinga'.mixture' for the pipe line, and

making electrodes, comprismgthe forcing of the pulverized carbon through a pipe line it passes through said pipe line, `introducing a binder through the circumferential sprayino' 'i device associated with said pipe line, and supplying an oilto the mixture as it passes through the pipe line to increase 8. A process for preparing a mixtures for making electrodes, comprising `the forcing A loi a pulverizedbodygivin'g material through.

a pipe line `by rtheuse of compressed an', an mtroducino' a binder to unite the pulverized materia Y 95A process fer the preparation of a mixture for the manufacture of electrodes, com-` pc making electrodes, comprisin the forcing'-` .of a pulverized carbon throng a pipeline, .supplying heat to the said pulverized cara binderv into the pi e line. to e pulveri'zed carbon a4 ter it has"- the 7 prising the forcing of heated pulverized car- 'bonthrough a pipe line by' means ofheated compressed air, and introducing into the pipe 'line `from all sides a. binder.`

10. A process for the preparation of a` mixture for Ithe manufacture of electrodes, comprislng the utilizing' of heated com pressed air to force pulverzed carbon through a confined passage, supplying a binder to the heated pulverized carbon as 4it passes throughthe confined .passage and introducing into the mixture `an oil for incrcasin the plasticity'of the mixture.V I

11. process for reparing a mixture for the manufacture ofpself-baking electrodes,

comprising the projection of. a heated pulverized` carbon through' a confined passage by means of heated compressed. air, introducing' pitch into'thev` confined passage to mix with the pulver'zedcarbon, and supplying to the mixture anfoil for increasing its plasticity.

12. A process for preparing a mixture for the making of self-baking electrodes coiny prising the forcing of a heated prepared carbon through a pipe line by the use ot' heated compressed air, feeding into the pipe line through which the pulverized carbon is passing pitch, and adding to the mixture a tar oil to increase the plasticity.

13. A process for preparing a mixture for the manufacture of self-baking electrodes, comprising the feeding into a pipe' line a prepared heated carbon, projecting said prepared carbon through the pipe line by `means of heated compre :ed air, feeding into said pipe line to mix :1th the prepared carbon pitch, and adding to the :mixture a tar oil for increasing the plasticity.

14e. A process for mixing a pulverized solid with a binder, comprising the heating of said pulverized solid, the feeding of it through a pipe line by heated compressed e air, and the mixing With the heated pulverized solid as it passes through the pipe line a binder to form a plastic mass.

15. In the process ot' combining pulverized solids to form 4a plastic mass for molding, the step of forcing the pulverized bodygiving solids through a confined passage, and the step of spraying a binder onto said body-giving solids. i

16e A method of producing a moldable material comprising the injecting into a confined passage a basic non-moldable material, propelling the lbasic non-moldahle material along a passage toward a mold, and entraining into the moving mass successively materiltll for rendering the resilient product molda e. i

17. A method of producing a moldable material comprising the injecting into a additional ingredients of a character suitable to complete the moldalole product.

19. In a method of preparing material to he molded, the step of causing carbon to progress in the form of a confined flowing stream under the action of compressed air, and introducing into the stream as it progresses pitch and oil to complete the moldable product.

vJCM-IN STEPHENSEN. 

